Orienting hopper for button feeding mechanism



Aug 22 957 E. BRONFMAN v 3,337,0@9

ORIENTING HOPPER FOR BUTTON FEEDNG MECHANISM Filed July E, 1965 3SheetS-Sheet l ug- ZZY 3957 B. BRoNFM-AN 3,337,989

ORIENTING HOPPER FOR BUTTON FEEDING MECHANISM Filed July C, 1965 3Sheets-Sheet N VE N TOR.

BRNFMAN TTRIVEK I BENJM/N Allg 22, 1967 B. BRONFMAN 3,337,089

ORIENTING HOPPER FOR BUTTON FEEDING MECHANSM Filed July 6, 1965 3Sheets-Sheet 5 v y m'v/N'fO/a. BENJAMIN anon/:MAN

l Arron/Vex United States Patent 3,337,089 ORIENTING HOPPER FOR BUTTONFEEDIN G MECHANISM Benjamin Bronfman, 3395 Colony Drive, Baldwin, N.Y.11510 Filed July 6, 1965, Ser. No. 469,523 23 Claims. (Cl. 221-160) Thisinvention relates generally to feed hoppers and is especially directedto improved apparatus adapted for automatically delivering properlyfaced buttons to a button feeder such as used with a sewing machine.

There are many devices employed for feeding buttons from a hopper to theautomatic button feed device used with a sewing machine. Ordinarily,means are not provided for turning over the button. Accordingly, thesedevices require that the button, as fed from the hopper, be correctlypositioned with the proper side up so that the feeder will supply thebutton to the sewing machine in the proper position for being sewn to agarment.

The present invention may be used with buttons having either two fiatfaces or one flat face and a depression in the opposite face.

The hopper must deliver Ibuttons consistently and positively sense andreject improperly faced buttons. Because tolerances are so broad in themanufacturing of buttons, the sensing means must be independent of thethickness of the button and responsive only to the face of the bottonthat is at and does not have a depresslon. Where the button is flat onboth sides the sensing means is not required.

It is also essential that the hopper mechanism be capable ofaccommodating different size buttons with but simple adjustment. Thehopper action must be positive, reliable and most important, the hoppermust have a long and useful life with a minimum of maintenancerequirements.

A high performance level must be maintained even under adverse operatingconditions. For example, the normal operating condition includes thepresence of lint and fibers of cotton and other material which caninterfere with the operation of such a hopper.

Accordingly, it is an object of the present invention to provide animproved hopper for button feeding apparatus employed with a sewingmachine which avoids the above mentioned diiculties and which permits ofsimple adjustment for the accommodation of buttons of a great variety ofsizes and shapes.

It is a particular object of the present invention to provide a hopperfor a button feeding apparatus which senses the facing of the button ata time in the cycle when the button is stationary.

An additional object is to provide sensing means that is not effected bydifferences in the overall thickness of the button.

A feature of the present invention is that for buttons having one ilatface and a depression in the opposite face, the sensing means of thepresent invention is responsive only to the face that is flat.

Still another object of this invention is to provide a hopper of suchconstruction as to be durable and reliable throughout its normalservice.

A different object of this invention is to provide a hopper arrangementwhich is not subject to jamming of the button supply.

Another object of this invention is to provide a hopper in which thesupply of buttons will not jam buttons in a sewing machine button feederattachment.

A further object is to provide improved means for rejecting anddisplacing improperly faced buttons.

An additional Objectis to. provide means for assuring ICC that only onebutton is at a sensing station at a particular time.

These and other features, objects and advantages of the invention will,in part, be pointed out with particularity and will, in, part,Ibecomeobvious from the following more detailed description of theinvention taken in conjunction with the accompanying drawing which formsan integral part thereof.

In the various figures of the drawing like reference charactersdesignate like parts.

In the drawing:

FIG. 1 is a pictorial view illustrating the physical relationship of asewing machine and an automatic button feeder with respect to the hopperof the present invention;

FIG. 2 is a partial plan view of the present invention;

FIG. 3 is a side elevation view partially broken away and taken alongline 3-3 of FIG. 2;

FIG. 4 is an elevational detail view of one component of the improvedhopper assembly;

FIG. 5 is a longitudinal sectional elevation View of the delivery chutetaken along line 5-5 of FIG. 2;

FIG. 6 is a fragmentary plan view taken along line 6 6 of FIG. 3;

FIG. 7 is a fragmentary elevation view of a portion of the buttonsensing means;

FIG. 8 is a fragmentary plan detail of the means provided for ejectingan improperly faced button; and

FIG. 9 is a fragmentary elevational view taken along line 9 9 of FIG. 8plus a schematic diagram of the circuitry used with the presentinvention.

Referring now to the drawing and specifically to FIG. 1, there is showna sewing machine S which is supplied with buttons from a button feederF, and a hopper 10 which supplies buttons B to the inclined chute C offeeder F. The buttons are randomly poured into a pile at the bottom ofhopper 10 and are carried to a funnel member in the hopper. It will benoted that the hopper is positioned at an angle with reference to thehorizontal.

Referring now to FIG. 2 and FIG. 3, the hopper is provided with acylindrical side wall 12 which extends over approximately 270 'degreesof the hopper circumference at one height, the remaining degrees of thewall being somewhat lower. The hopper is also provided with concentricbottom wall portions 14 and 16 defining an annular space 18therebetween. Since the hopper is inclined,

the buttons randomly accumulate in the bottom half of the hopper. Door20 in wall 12 provides means to empty the hopper when, for example, thebuttons are to be changed.

Ring 22, rotatingly positioned in annular space 18 has eight uniformlyspaced V-shaped claws 24. Preferably, one ear 25 of each claw is bent upto provide mixing action to reorient the buttons. As the ring is driven,by means to be described more fully hereinafter, the claws each pick upat least one button B and carry it around to the apex A of the hopper.vAt this point gravitational force" pulls the button olf the lower edgeof the V-shaped clawv and drops it down into a chute member 26. Thebutton hits a wall and rolls down into a guide track 30'which connectswith the feeder-chute C.

Since the hopper is intended to accommodate al range of button sizes,claw 24 may at times pick up several small buttons, as shown in FIG. 2.In that event, as the ring rotates, button B will intersect and deflectone or more of thespring fingers 32 made of resin-impregnated glassfiber cloth. The resilience of the fingers will push button B into thecrotch of the claw to displace and eject button B.

Spring fingers 32 may be made from a ilexible strip approximately 1Ahigh by 0.010 thick which is folded into irregular loops approximately1/z long. The folds of the spring are positioned in slots 36 formed inbar 38 and secured thereto by screw 40 and nut 41. The entire assemblyis supported by angle bracket 42 which is provided with a slot to permitangular adjustment of the sweeper assembly with respect to thecircumferential path of the claw. In the event that the extra button ison the left, in the position occupied by button B', then sweeper 44(FIG. 4) will intercept and deiiect it. It will be noted that sweeper 44is provided with a notch 46 so that a single button B will passunderneath but a second button resting on top of a properly positionedbutton B will be deiiected should a rejected button fall back upon anaccepted button beyond the sensor.

As button B reaches the apex and slides down into chute member 26 havingan embossed surface, a cover plate 48 prevents it from falling off.Cover member 48 may be adjusted vertically with respect to the lowersurface of the chute member by means of screw and slot arrangement. Thebutton then strikes adjustably positioned wall 52, slides through thespace defined by the end of wall 52 and wall 54, passes under cover 56and then down guide track 30. Inner cover 56 may be raised and loweredby means of adjusting screws 58 secured to the cover to assure thatthere is room for single button only, thereby avoiding -a later pile-upof two buttons (FIG. Inner cover 56 is formed of a single metal stripwhich is preferably bent up at its upper end to provide an upstandingwall 60. This construction prevents buttons from falling in between theouter cover 61 and inner cover 56. Spring 62 acts against post 64 andscrews 58 to prevent them from rotating.

In the event that the guide track 30 is lled, excess buttons will falloff the upper end of the chute and back into the button pile forrepickup. Since the buttons are fed into the track by gravity there isno pressure on them, other th-an their own weight, to cause a jam-up.

Thus there has been described above the cycle for a button which isproperly faced and which would be suitable for a button which isidentical on both surfaces. However, buttons are generallynonsymmetrical with respect to their top and bottom surfaces. That is,one button sur face is flat and the opposite surface has -a depression.These buttons must be delivered to the sewing station with thedepression facing upwards. Means are provided in the present apparatusfor detecting and rejecting inverted nonsymmetrical buttons. If a buttonwith a at upper surface and recessed lower surface is used, a deliverychute with a 180 twist is used to invert the button.

As the buttons are moved circumferentially by the ring 22, they reach atest position at which time a feeler gage determines whether or not thebutton is inverted. A feature of this invention is that this test ismade at a time when the button is at rest.

In order to achieve the necessary intermittent motion, a Geneva drive isemployed. Motor 70 is coupled through a right angle drive 72 to a Genevadriver 73 (FIG. 6). The driver carries roller 74 which is arranged toengage driven wheel 76. The driven wheel shown has, for example, eightradial slots 7 6a located 45 degrees apart so that roller 74 engages oneof these slots each time the driver makes a revolution. Thus the drivenwheel turns Ms revolution. The concentric surface 75 engages the concavesurface 77 between each pair of slots before the roller is disengagedfrom the slot in the driven wheel. This prevents the driven wheel 76from rotating while the roller 74 is moving around to engage the nextsuccessive slot. The circular boss on the driver 73 is cut away at 79 toprovide clearance for the projecting slotted arms of the driven wheel.

The underside of driver 73 carries a cam member 78, the high point ofwhich is angularly coincidental with roller 74. Therefore, cam 78engages cam follower 82 at a time when the driven wheel is stationary.Cam follower 82 rides in slotted block 84 and is driven downwardly bythe cam against the biasing force of spring 86. Screw 88 limits theupward travel of the follower.

Driven wheel 76 has -adjustably aixed thereto a phasing plate 90 uponwhich are mounted upright spacer posts 92 (FIG. 6). Annular ring 22 isin turn affixed to the posts so that it may be intermittently rotated bywheel 76. Slots 94 in plate 90 permit angular phasing orientation of theplate 90 with respect to wheel 76. Screws 96 are used to clamp togetherplate 90 and driven wheel 76 when they are properly phased. Driven wheel76 journaled in suitable bearings 69 rotates about a fixed shaft 98which is supported by base plate 100. The inner, bottom wall 14 ofhopper 10 is fixed to the end of shaft 98.

As cam 78 engages cam follower 82, moving it downwardly, vertical shaft102, slidably disposed in block 84 and attached to cam follower 82,moves downwardly together with a sensing assembly shown generally bynumerals 105. It will be noted that sensing assembly may be verticallyadjusted by loosening clamp means 107 and horizontally adjusted by meansof a conventional screw and slot arrangement 10711. Sensing assembly 105is also pivotally mounted with respect to clamp means 107 by a torsionspring 109 extending therebetween. Sensor assembly 10S is pivotal aboutpin 106 in the direction shown by arrow a in FIG. 7. The pin 106 extendsthrough a block 108 that is secured to clamp means 107 by means of screw107k. Block 108 tits loosely in a groove in the sensing assembly. Asshown in FIG. 7 torsion spring 109 is wrapped about pin 106 and extendsbetween block 105 and clamp means 107.

The sensing device (FIG. 3) must be able`to differentiate between aninverted button and a face-up button. Pivoted block 110 carries ahollow, sliding shaft 112. Spring 114 extends between ange 116 of shaft112 and the underside of block 110, to thrust the lower face of the angeagainst the upper face of the button B under test. Shaft 102 continuesdownward travel so that buttons of various thicknesses will be sensed.Shaft 112 has a switch 118 secured to the upper end thereof by means ofa bracket 120. Shaft 122 is slidably supported in central bore 124 ofshaft 112 and extends below ange 116. The lower end of shaft 122 fallsinto a prepositioned depression on the top surface of button B to sensethat the button is properly faced.

As shown in FIG. 3, the action of cam 78 has lowered shaft 102 and thebottom end of sensing shaft 122 is seated in the depression of acorrectly facing button. The upper end of shaft 122 while against theswitch actuator pin 119 will not move it sufficiently to actuate theinternally spring loaded switch contacts. Since the button is correctlyfaced, it will continue moving intermittently along a circumferentialpath for delivery to the chute as hereinbefore described. However, ifthe button is incorrectly faced with its flat surface directed upward,then shaft 122 is also directed upwardly against the switch pin 119sutiiciently to actuate the switch contact to complete an electricalsolenoid circuit.

Spring 126 resiliently supports shaft 122 so that the dimensionalrelationship between the button surface of flange 116 and the lower endof sensing shaft 122 is always maintained. Thus the sensing means isindependent of the thickness of the button which vmay vary greatly dueto the wide range of manufacturing tolerances. Accordingly, the sensingswitch will be activated only when the button depression facesdownwardly. Cooperating with the shaft and flange arrangement is a nutthreadably secured to the upper end of shaft 112. The nut serves as amounting means for switch bracket so that the spacing between the upperend of shaft 122 and the contact of switch 118 may be accurately set andeasily maintained.

To prevent the annular ring from coasting after it has been indexed bythe Geneva motion, a brake 130 is provided (FIG. 2). This brake consistsof an arm formed of a spring material such as the impregnated fabricwhich brushes against the edge of the button so as t0 stop rotation.When the annular ring is being driven, then there is sufficient forceexerted to push the button past the slight restraining action of thebrake arm.

In the event that the button is inverted and the microswitch is closed,then solenoid 132 is energized pulling down armature 134 and lever 136mounted thereon (FIGS. 8 and 9). The lever is pivoted on pin 138 wherebylever end 140 enters the slot 18 adjacent to the annular member 22 so asto throw out the button just sensed. Compression spring 142 disposedabout pin 138 provides a frictional pivot point. The lever member islocated directly ahead of the sensing position and accordingly throwsout the button immediately after it has been sensed.

At this time is should be pointed out that claw 24 is provided with adownwardly extending dimple 24a which rides in the annular slot 18adjacent ring 22. The circumferential movement of the claw causes dimple24a to push down lever 136 thereby restoring the armature to itsunenergized position, The pivoting motion of lever arm 136 is controlledby spring 142 so that it will remain xed subject to actuation either byarmature 134 or dimple 24a.

As is shown in FIG. 8, the electrical circuit for the apparatus is quitesimple. The apparatus is connected to a conventional electrical linethrough a main switch 144, the closing of which will actuate the drivemotor 70 and energize the circuit to the solenoid 132 through themicroswitch 118 whereby closing of the microswitch will actuate thesolenoid. Switch 141 permits disabling of the solenoid circuit forconvenience of the user in adjusting the apparatus for different sizebuttons.

Spring clips 146 serve to retain top cover T which may be of atransparent plastic so as to enable the operator to readily determinewhether or not an additional supply of buttons is required. The unit maybe provided with an angle member 148 and screws 150 to permit attachingthe feeder to utilization means such as a button feeder.

It will be appreciated that the device described above is assembled fromsimple, reliable, actuating elements which are sturdy and are notdependent on fine adjustments or close tolerances and nowhere rely ondelicate members for operation.

The present invention is particularly useful in feeding properly faced,nonsymmetrical buttons to a utilization device without resorting to theconventional twisted or helical track which is costly and troublesome inhigh speed construction. Means are provided to intermittently move abutton carrier and, in combination therewith, still other means assurethat one and only one button is carried to the sensing station by eachmovement of the carrier. If the button is properly faced for sewing, itcontinues its intermittent motion and is carried in this position to adelivery chute for transport to the utilization device. If the button isimproperly faced, ejector means associated with the sensing stationautomatically removes the button from the carrier.

The sensing station, in addition to being adjustable in two mutuallyperpendicular planes, is also pivotally mounted thus precluding thepossibility of damage should several buttons accumulate therebelow. Inaddition, the construction of the sensing means makes it independent ofthe button thickness which can vary greatly due to manufacturingtolerances. Instead, the sensing means detects only the difference inheight between the top button surface and the base of a depression inthe top surface. This is a properly faced button and accordingly theswitch associated with the sensor is not actuated. However, if thebutton is inverted and improperly positioned for sewing, then thesensing means only touches the top button surface. The microswitch isactuated by the elevated position of the microswitch and in turn closesthe circuit to a solenoid which controls the ejection means. I`he twoaforementioned sensing conditions occur only when the button isstationary in between its intermittent circumferential motions.

There has been disclosed heretofore the best embodiments of theinvention presently contemplated and it is to be understood that variouschanges and modifications may 6 be made by those skilled in the artwithout departing from the spirit of the invention.

What is claimed is:

1. An improved hopper for holding a reserve supply of randomly facedbuttons and for automatically delivering correctly faced buttons to asewing machine button feeding attachment, said hopper comprising:

(a) a button chamber adapted to hold the supply of randomly facedbuttons said chamber including;

(l) an upstanding circumferential wall devoid of any openings at thebase thereof through which the buttons may pass;

(2) a fixed base member having an annular space therein, said basemember being rigidly secured at its periphery to said wall; and

(3) a ring rotatably disposed within the annular space in said basemember;

(b) a plurality of angularly displaceable claw members secured to theupper surface of said ring for rotation therewith, each of said clawmembers being adapted to carry a button along a circumferential path;

(c) means to intermittently move said claws along the circumferentialpath;

(d) means to sense the facing direction of the button carried by one ofsaid claws when said claw is stationary between intermittent movements;

(e) means to eject an improperly faced button after it has been sensed;and

(f) means to deliver a properly sensed button to the button feedingattachment.

2. The apparatus in accordance with claim 1 including mixing meansintegral with and extending upwardly from said claw members wherebyrotation of said ring member causes mixing of the randomly faced buttonsin said chamber.

3. The apparatus in accordance with claim 1 wherein said claw member iscomprised of a substantially at plate having a wedge-shaped end facingin the direction of its travel, said wedge-shaped end being dened by apair of legs forming an angle therebetween.

4. The apparatus in accordance with claim 1 including paddle meanscarried by said ring member for mixing the buttons in said hopper.

5. The apparatus in accordance with claim 1 wherein said means tointermittently move said claw members comprises:

(a) a motor having a drive shaft;

(b) a Geneva mechanism having a driving plate -coupled to the driveshaft of said motor for continuous movement therewith and a driven platecoupled to the driving plate for intermittent angular movement withrespect thereto, said angular movement -of the driven plate being afraction of the movement ofthe driver plate and (c) means mechanicallylinking said claw members to the driven plate whereby said claw membersare actuated by the driven plate of said Geneva mechamsm.

6. The apparatus in accordance with claim 5 including phasing mean-sadapted to vary the angular relationship between said Geneva mechanismdriver plate and said claws.

7. The apparatus in accordance with claim 1 wherein said sensing meansis pivotally mounted and there is also irzluded a biasing member actingon said sensing means.

8. In a hopper including a button chamber adapted to hold a supply ofrandomly faced buttons, a plurality of claws and means arranged tointermittently move the claws whereby a button is carried by a clawalong a circumferential path, improved means to sense the facingdirection lof the button, said improvement comprising;

(a) a block member mounted on the button chamber;

(b) a first plunger slidably positioned in said block member, said rstplunger having a transverse lower aaa/,ssa

'2' face adapted to seat on the rim of the button, said lower face beingnormally positioned in spaced relation above the plane of the upperbutton surface;

(c) means to seat said lower plunger face on the upper button surface intimed relationship to the intermittent movement of the claw, saidplunger being seated when the claw is stationary;

(d) first biasing means normally urginv said plunger face away from saidblock and onto the button rim;

(e) a second plunger slidably disposed within said rst plunger andarranged to extend below said transverse face thereof, said secondplunger being adapted to drop into the depression of a correctly facedbutton, said second plunger being urged upwardly by the flat surface ofan incorrectly faced button;

(f) switch means responsive to the upward movement of said secondplunger; and

(g) button ejection means responsive to the actuation of said switchmeans whereby an improperly faced button is ejected.

9. The apparatus in accordance with claim S including second biasingmeans normally urging said second plunger in a direction away from thetransverse face to said first plunger.

10. The apparatus in accordance with claim 8 including means to set aspaced relation between the upper end of said second plunger and saidswitch means.

11. The apparatus in accordance with claim 8 wherein said ejection meanscomprises:

(a) a s-olenoid having an armature responsive to the actuation of saidswitch means;

(b)a lever pivotally mounted on said solenoid, said lever having a rstend secured to and movable with the armature of said solenoid from afirst starting position -to a final position and a second end adapted tobe positioned in the circumferential path of an improperly faced buttonafter the button is sensed whereby the second end of said arm ejects thebutton from the claw.

12. The apparatus of claim 11 including means for depressing said leverafter passage of a claw to return said armature to the startingposition.

13. The apparatus in accordance with claim 8 wherein said means to seatthe lower face of said first plunger comprises:

(a) a rod secured at one end to said block;

(b) a cam follower secured to the opposite end of said rod;

(c) cam means carried by the means to impart intermittent motion to theclaws, said cam means being arranged to engage said cam follower whenthe said claw members are stationary in between intermittent movementswhereby the lower face of said rst plunger is urged into seatingposition on the upper button surface.

14. The apparatus in accordance with claim 1 wherein said chamber isfixed at an angle to the horizontal plane and wherein said means todeliver a properly faced button comprises va hollow inclined chutehaving its upper end in communication with the highest point on thecircumferential path and its lower end in communication with the buttonfeeding attachment whereby a properly faced button falls off thecarrying claw and into said chute and is `gravity-fed to the buttonfeeding attachment.

1S. The apparatus in accordance with claim 14 wherein the interiorheight dimension of Said chtite is variable,

said dimension being maintained only slightly greater than the thicknessdimension of the button.

16. The apparatus in accordance with claim 1 including sweeper fingerspositioned in the circumferential path of the buttons at a point priorto the sensing thereof, said fingers being arranged to displace all butone button from each of said claws when said buttons are all disposed ina common plane.

17. The apparatus in accordance with claim 16 wherein said lingers areresilient.

18. The apparatus in accordance with claim 1 ineluding brake meanspositioned to engage a button carried by one of said claws at thesensing position whereby the button is prevented from coasting past saidsensing means.

19'. The apparatus in accordance with claim 1 including a sweeper fingerpositioned in the circumferential path of the buttons at a pointsubsequent to the sensing thereof, said finger being arranged todisplace a button superimposed on top of the button carried by saidclaw.

20. The apparatus in accordance with claim 19 wherein said finger isrigid and is provided with a notch, the notch being of sufiicient depthto permit only a single thickness of button to pass therethrough.

21. The apparatus in accordance with claim 8 wherein said block ispivotally mounted and resiliently biased with respect to the chamber.

22. ln a hopper including a button chamber adapted to hold a supply ofrandomly faced buttons, a plurality of claws and means arranged tointermittently move the claws whereby a button is carried by a clawalong a circumferential path, improved brake means to prevent a buttonfrom coasting past means to sense the facing direction of the button,said brake means comprising a resilient finger positioned to engage thebutton at the sensing position, the movement of the button carried bythe claw after the button is sensed being sufficient to deflect thefinger.

23. In a hopper including a button chamber adapted to hold a supply ofrandomly faced buttons, the chamber being defined by an upstandingcircumferential Wall, a fixed base wall and a ring member rotatablewithin an annular space in the base Wall, a plurality of claw meanssecured to the ring member and arranged to be intermittently moved alonga circumferential path while carrying a button and means to sense andeject an improperly faced button, the improvement comprising adownwardly eX- tending member positioned Within the annular space in thebase wall of the chamber, said member being positioned to engage theejection means after the button is sensed whereby the ejection means isreturned to its original position if the button `sensed was improperlyfaced and ejected.

References Cited UNITED STATES PATENTS 887,298 5/1908 Wilmore. 1,664,3103/1928 Murray 133-3 1,850,148 3/1932 'Brandt 133-3 2,211,511 8/1940Melzer et al. 221--13 2,505,468 4/1950 Fore-a 221-9 2,639,034 5/1953R-oeber 221-160 2,720,209 10'/ 1955 Miller 133-8 SAMUEL F. COLEMAN,Primary Examiner.

1. AN IMPROVED HOPPER FOR HOLDING A RESERVE SUPPLY OF RANDOMLY FACEDBUTTONS AND FOR AUTOMATICALLY DELIVERING CORRECTLY FACED BUTTONS TO ASEWING MACHINE BUTTON FEEDING ATTACHMENT, SAID HOPPER COMPRISING: (A) ABUTTON CHAMBER ADAPTED TO HOLD THE SUPPLY OF RANDOMLY FACED BUTTONS SAIDCHAMBER INCLUDING; (1) AN UPSTANDING CIRCUMFERENTIAL WALL DEVOID OF ANYOPENINGS AT THE BASE THEREOF THROUGH WHICH THE BUTTONS MAY PASS; (2) AFIXED BASE MEMBER HAVING AN ANNULAR SPACE THEREIN, SAID BASE MEMBERBEING RIGIDLY SECURED AT ITS PERIPHERY TO SAID WALL; AND (3) A RINGROTATABLY DISPOSED WITHIN THE ANNULAR SPACE IN SAID BASE MEMBER;